Question

Ursula and her friends are playing rolling. Ursula Rose a large along the ground. The hoop rotates through an angle of 3/2 pi radiance in one second. how many revolutions does the hoop up make in one minute?

Answer 1

hoop will rotate 3/2 pi × 60 radians in a minute. So it will rotate and form angle of 90 pi. A circle has 2 pi radians of angle. So total number of revolutions= 90pi ÷ 2pi = 45. So it will make 45 revolutions in a minute.